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Area Converter Calculator

Convert nonnegative area values among metric, international-foot-based, acre, hectare, and square-inch units.

Published

Converted area
Result
10.76391 ft²
Square Kilometers (km²)
0.000001
Square Yards (yd²)
1.19599
Square Miles (mi²)
0
Acres (ac)
0.000247
Enter a numeric value to convert between area units.

Results update as you type.

Area Converter Calculator

Choose source and target units. Every conversion passes through square meters using defined length relationships squared.

Factors in square meters

UnitExact dimensional factor
square inch0.0254²
square foot0.3048² = 0.09290304
square yard(3 × 0.3048)² = 0.83612736
square mile(5,280 × 0.3048)² = 2,589,988.110336
acre43,560 × 0.3048² = 4,046.8564224
hectare10,000
square kilometer1,000,000

target=value×source factortarget factor\text{target}=\frac{\text{value}\times\text{source factor}}{\text{target factor}}

For example, 850 ft² is 850 × 0.09290304 = 78.967584 m². Results are rounded only after conversion. Negative areas, unknown units, invalid numeric inputs, and conversions with results too large to represent are rejected.

Sources

Frequently asked questions

What arithmetic does this calculator use?
The method and defining factors are shown on the page. Arithmetic retains the full factor and rounds only the display.
What inputs are rejected?
Negative or invalid numeric inputs, unknown unit selections, and values whose results are too large are rejected.

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